Chimney, duct, and the like



l Oct-12,1943. A, v sTANlFoRTH 2,331,436

CHIMNEYS, DUCTS, AND THE LIKE I nuentov, :flbert V.

Stanijorth/ Oct. l2, 1943. A. v. sTANlFoR'rH CHIMNEYS, DUCTS, AND THE LIKE 2 Sheets-Sheet 2 Filed June 2, 1942 Inventum fl/bu'i V. Stani/fovth/ m50 nay l Patented Get. 12, 1943 'OFFICE CHIMNEY, DUCT, AND THE LIKE Albert Victor Staniforth, Withernsea, East Yorkshire, England Application June 2, 1942, serial No. 445,495 In Great Britain March 31, 1942 12 claims.

The. present invention relates to chimneys, fluesand the like and to ducts such as are used in boiler installations and is particularly concerned with steel chimneys. The present invention is an improvement on the subject matter of my prior Patent No2 2,272,138.

According to the specication of said patent a chimney, duct or the like is provided'with a lining comprising a'plurality of lining panels with cast iron cover strips or bars covering the gaps between adjacent panels and serving to hold the latter in position and which strips or .bars are engaged by clamps secured to the wall of the chimney or the like.

In the form described in the specification of the saidpatent the said strips or bars are provided with recessed or cut away ends to form steps to be engaged by outwardly projecting lugs on the sides of said clamps.

The principal object of the present invention is to provide an improved and modied form of the said cover bars and clamps whereby the necessity of recessing the ends of the cover strips or bars is avoided, whereby the bars and clamps have a smooth and even contour providing little lodgement for dust and other contaminating material, and whereby the joints between the cover bars and clamps may be readily made tight against leakage of flue gases or moisture.

Furthermore owing to the fact that the cover and the lining panels with the clamps and cover bars in elevation. 1

Figs. 3 and 4 are a front and side elevational views respectivelyof an alternative form of clamp.

Fig. 5 represents in front 'elevation another form of clamp. 1

Fig. 6 represents in section an alternative form of cover bar and Fig, 7 shows an example of the applicationof the invention to a steel chimney.

The general arrangement and assembly of the lining panels is similar 'to that described in the specification of my aforesaid Patent No.v 2,272,138 the lining panels l being bedded onto the Walls of a chimney indicatedgenerally at l2 in Figs. 2 and 'l preferably with an interposed protective coating I3, said lining panels being secured to the inner side of the chimney or the like by means of cover bars 2 which in tLu'n are held at their ends by means of the xing clamps 3.

The cover bars 2 are however of uniform arcu-l ate or V sectionthrougho'ut and are'recessed on the underface and if' desired provided with spaced transverse strengthening ribs 8. As shown best in Fig. 2 said cover bars may be of 'a somewhat flattened semi-circular section having a flattened apex portion la. 'As explained above bars are not recessed at the ends the whole arrangement is more convenient from theassembly point of view, as the cover bars, being of uniform section along the length,V may be readily cut to length where substandard or special lengths are required.

A further object oi the invention is to provide an improved form of such lining` panels whereby they are less liable to attack by the flue gases.

In accordance with the present invention a chimney, duct or the like as referred to in the specification of the said prior patent employs a cover strip or bar of uniform section throughout its length and clamps for holding said cover bars in position which have a smooth yand uniform external contour and are provided with side openings to engage the cover bars and shaped to follow the conguration thereof.

The features of the present invention are represented by way of example in the accompanying drawings in which- Fig. 1 is a front elevational view showing the clamps and cover bars.

Fig. 2 is a section showing the chimney wall,

` tioned to engage the flattened part i4 at the the section of said bar 2 is conveniently uniform throughout, permitting same to be cut to length when for any reason a cover bar of standard length cannot be utilised.

The fixing clamps 3 have -a dome shaped outer surface conveniently such as would be formed by a section'of a sphere and provided at spaced points around the periphery or at one point only, with side openings l5 shaped to fit around the cover bars 2 with a small clearance. Engagement between the clamp and the cover bar is conveniently effected by means of a boss l5 posiapex of the cover bar.

Fig. 1 shows in front elevation a form of clamp having three side openings I5 and indicates the general part spherical form of the clamp except f where the side openings are located and this is also shown in Fig. 2. The dotted lines Il indicate the position of a further side opening where the clamp is to have four openings altogether. Strengthening ribs I8 are preferably provided on the inner side of the clamp running towards the boss i6 at each side opening.

Said clamp is conveniently formed of cast iron and is hollowed on the underside and there is formed at the centre a deep depression I9 adapted to take the head of a iixing bolt or nut 5, said recess being formed in a boss 20 projecting into the hollowed under face of the clamp, the ribs I8 merging into said boss.

It will be realised that such forms of clamp may be provided with only one opening I to take one cover bar or up to four openings may be provided at spaced points. It also will be appreciated that it is not necessary to cut the cover bars 2 exactly to length as, within certain limits, the ends of the bars can project to a greater or less extent into the space within the hollow under face of the clamps,gprovided Aof course it does not engage the boss 28 taking the xing bolt. In Fig. 1 the two cover bars are shown as extending to different degrees into the clamp 3. Not only does this arrangement provide for a considerable degree of exiblity in assembly but the Whole structure is mechanically flexible to allow for expansion and contraction and wind away.

In assembling a chimney lining in accordance with the present invention the lining panels I are bedded on the plastic coating layer I3, on the chimney wall I2 and similarly the` hollow underfaces of the cover bars 2 and clamps 3 are also filled with plastic compound and in assembly said plastic fllling is forced intoV the spaces between the cover bars and the side openings I5 in the clamps to give a very high degree of fluid tightness and effectively preventing the access of flue gases, moisture or the like to the chimney walls. It will of course be appreciated that the recess I9 in the face' of the clamp, taking the head of bolt 5 is filled in with a plastic compound and finished off to follow the curved formation of the clamp thus leaving no space which might collect dust or other deleterious material.

In some cases it may be desirable to utilise a smaller or simplified form of clamp especially where the clamp is to be provided at a terminal joint. Such a clamp is shown in Figs. 3 and 4 and is of rectangular shape hollowed on the underside and with well rounded corners and secured by a fixing bolt 5 located in a recess I9 displaced towards one side of the clamp, the opposite side being provided with a side opening I5 to take the cover bar. Fig. 5shows another form of clamp which is rather smaller than the spherical clamp shown in Figs. 1 and 2, and is of broadly square shape, hollowed on its underface, and substantially domed or curved on its outer face. This clamp is provided with side openings I5 on two or more sides to take the cover bars as in the spherical form of clamp described above, strengthening ribs I8 being provided on those sides having the openings I5.

The forms of clamps shown in Figs. 3 to 5` may sometimes be necessary or convenient in conjunction with the other clamps where there is insuicient spacing available between the fixing bolt 5 and some other obstruction or when it is desired to bring a lining closely up to an aperture or branch in the wall of the chimney or the like.

Fig. 6 shows an alternative form of cover bar having a V-shaped section conveniently with slightly concave or convexly rounded sides and a flattened apex I4. The clamps 3 for use therewith are provided with correspondingly shaped side openings I5 and a boss I6'to` engage the apex I4 of the cover bar.

I claim:

l.A A chimney, duct or the like comprising an outer structure formingthe chimney proper, a plurality of lining panels, within said structure,

cast iron cover bars provided with a flattened portion at the apex and of uniform section throughout their length, clamps provided with side openings to embrace the ends of said cover bars, a boss at each said side opening in said clamps adapted to engage the flattened portion of the cover bars to hold same in position and means to secure said clamps to the aforesaid structure.

2. A chimney, duct or the like comprising an outer structure forming the chimney proper, a plurality of lining panels within said structure, cast iron cover bars having a hollowed under face and of uniform section throughout their length, strengthening ribs extending across said hollowed under face, clamps provided with side openings to engage the ends of said cover bars and means to secure said clamps to the aforesaid structure.

3. A chimney, duct or the like comprising an outer structure forming the chimney proper, a plurality of lining panels within said structure, cast iron cover bars having a hollowed under face and provided with a flattened portion at the apex, said bars being of uniform section throughout their length, clamps provided with side openings to embrace the ends of said cover bars, a boss at cach side opening in said clamps to engage the iiattenedy portion of the cover bars and means to secure said clamps to' the aforesaid structure.

4. A chimney, duct or the like comprising an outer structure forming the chimney proper, a plurality of lining panels within said structure, cast iron cover bars having a hollowed under face and provided with a flattened portion at the apex, said bars being of uniform section throughout their length, clamps providedl with side openings to embrace the ends of said cover bars, a boss at each said side opening to leave a; space around said opening except adjacent the flattened portion of the cover bars which space is filled with a plastic filling compound which also fills the under faces of the cover bars and of the clamps and means to secure said clamps to the aforesaid structure.

5. A chimney, duct or the like comprising an outer structure forming the chimney proper, a plurality of lining panels within said structure, cast iron cover bars of uniform section throughout their length covering the joints between adjacent panels, clamps which are hollowed on the under face and provided with side openings to engage the ends of said cover bars, a hollowed boss in said clamps forming a deep depression from the outer face and fixing means co-operating with said depression to secure said clamps to the aforesaid structure.

6. A chimney, duct or the like comprising an outer structure forming the chimney proper, a plurality of lining panels Within said structure, cast iron cover bars of uniform section throughout their length covering the joints between adjacent panels, clamps of broadly square form having well rounded corners and a domed external form and one or more side openings'to receive the ends of one or more cover bars and means to secure said clamps tothe aforesaid structure.

7, A chimney, duct or the like comprising an outer structure forming the chimney proper, a plurality of lining panels bedded onto the inside of said structure by means of a protective coating, cast iron cover bars having a hollowed under face filled in with a plastic resistant composition and oi uniform section throughout their length, said bars covering the joints between adjacent panels,

clamps having a hollowed under face also iilled with a plastic resistant iilling and provided with side openings to embrace the ends of said cover bars and means to secure said clamps. to the aforesaid structure.

8. In a lined chimney, duct or the like, comprising an outer structure and a plurality of contiguous protective panels lining the inner surface thereof: means for securing said panels to the outer structure, comprising cover bars of uniform cross section throughout their length and having straight end portions spanning the joints between adjacent panels and engaging the edge portions thereof; and a member secured to the outer chimney structure at each end of a cover bar to clamp said bars, and through them the panels, to the outer structure, saidclamping members having lateral openings slidably receiving the straight end portions of the cover bars to accommodate expansion and contraction of the parts.

9. A chimney structure accordingr to claim 8, wherein the clamping members are of substantially dome-like formation, and have a smooth dust-shedding external contour.

10. A chimney structure according to claim 8, wherein the cover bars have a cross section providing an outer dust-shedding surface.

11. A chimney structure according to claim 8, wherein the cover -bars are of substantially arcuate cross section, providing an outer dust-shedding surface. l i

12. A chimney structure according to claim 8, wherein the cover bars are of substantially V- shaped cross section, providing an outer dustshedding surface.

A. v. s'rANIFoR'rH.r 

